An phan tich cac so 120, 306, 567 ra thua so nguyen to nhu sau:

120 = 2 . 3 . 4 . 5;

306 = 2 . 3 . 51;

567 = \(^{9^2}\) . 7

An lam nhu tren co dung khong? Hay sua lai trong truong hop An lam khong dung.

D = 2539ab chia het cho 24

24 = 3 . 8 . Va 3;8 nguyen to cung nhau 

D chia het cho 8 <=> 9ab chia het cho 8

cac bn lam tiep ho minh nhe to lam den day la chiu roi neu to lam sai thi cac ban sua lai ho minh nhe thanks nhe

tim x , biet : 

\(\frac{-1}{3}\le x\le\frac{-2}{7}\)

giup mk nha cac bn,lam on

1. Tim so nguyen to sao cho:

p+2;p+6;p+8;p+12;p+14 cung la so nguyen to.

2. Tim x biet:

60 = \(2^x\) * 3 * 5 va 60 co 12 uoc.

xin loi cac ban nha, may minh khong danh dau duoc, mong cac ban thong cam va lam dum minh nha!Cam on cac ban!

kh bt lam

cac ban lam bai xong chua

Khi chia so a cho 18 ta duoc so du la 6. Hoi:

a) so a co chia het cho 6 khong?

b) so a co chia het cho 9 khong?

Cac ban nho giai thi ghi cach lam ra dum minh nha can gap lam do!!!!!!

co 5 diem trong do khong co 3 diem nao thang hang 

a . co bao nhieu bao tam giac cac diem lam dinh

b . neu co n diem thi co bao oxythang 1 duongtam  nhan cac diem lam dinh